[PATCH] D118545: [ARM] Fix 8-bit immediate overflow in the instruction of segmented stack prologue.

[Zhiyao Ma via Phabricator via llvm-commits]

ZhiyaoMa98 created this revision.
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For thumb1-only targets, load an immediate number larger than 255 by a sequence of shift and add instructions. For thumb2 targets, load it by a pair of `movw` and `movt` instruction. It fixes the bug that the instructions containing 8-bit immediate number cannot handle the allocation of a stacklet larger  than 255 bytes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D118545

Files:
  llvm/lib/Target/ARM/ARMFrameLowering.cpp

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